Why do I keep getting errors when trying to connect my bank accounts? It shows up under linked accounts but when I enable it gives me an error message. In app & online

I unlinked one of my accounts in the app hoping to start over because it would be connected just unable to be enabled. I tried to reconnect on the website as it eventually was able to link my business account that way. So it's possible to link from my credit union. But now I'm trying to link my personal acct from the same credit union and it's saying it cannot fetch accounts from my bank. Same with my Bank of America credit card account. I'm getting an error that it's not connected but it says it's enabled. This is a pain!!